"""Create hashed service-account credential storage."""

from __future__ import annotations

import sqlalchemy as sa
from alembic import op

revision = "0003_identity_credentials"
down_revision = "0002_control_plane"
branch_labels = None
depends_on = None

_INDEX = "ix_credentials_service_account_active"
_TABLE = "service_account_credentials"


def upgrade() -> None:
    """Create identity storage without retaining bearer secrets."""

    op.execute(sa.text("CREATE SCHEMA IF NOT EXISTS identity"))
    op.create_table(
        _TABLE,
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column("service_account_id", sa.Uuid(), nullable=False),
        sa.Column("workspace_id", sa.Uuid(), nullable=False),
        sa.Column("issue_sequence", sa.BigInteger(), sa.Identity(), nullable=False),
        sa.Column("token_prefix", sa.String(32), nullable=False),
        sa.Column("token_digest", sa.LargeBinary(32), nullable=False),
        sa.Column("scopes", sa.JSON(), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("expires_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("revoked_at", sa.DateTime(timezone=True), nullable=True),
        sa.UniqueConstraint("token_digest", name="uq_credentials_token_digest"),
        schema="identity",
    )
    op.create_index(
        _INDEX,
        _TABLE,
        ["service_account_id", "workspace_id", "revoked_at", "expires_at"],
        schema="identity",
    )


def downgrade() -> None:
    """Remove only this migration's identity table and index."""

    op.drop_index(_INDEX, table_name=_TABLE, schema="identity")
    op.drop_table(_TABLE, schema="identity")
    op.execute(sa.text("DROP SCHEMA IF EXISTS identity"))